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District (SJVAPCD) and the Federal Environmental Protection Agency have jurisdiction over this activity. Present requirements for both agencies are incorporated into the Permit to Operate issued by the SJVAPCD (JTD Appendix A). The first phase of a LFG control system was installed in 2006, which included nine vertical LFG wells and the flare station. This initial system has been expanded with the installation of four horizontal collectors in Module 1. Additional horizontal collectors will be added as the landfill is developed. The configuration and extent of the final landfill gas system is shown on Figure 13- 2. It is assumed that all LFG system components are installed in projects prior to the closure project and that no construction costs for the LFG system will be incurred during closure. Costs for operation and maintenance of the LFG collection system in the postclosure maintenance period are included in postclosure maintenance costs. Landfill gas condensate generated by the LFG collection system will be handled as leachate in accordance with the Waste Discharge Requirements. 2.5.4 LFG Treatment Collected gas will be combusted as fuel for electrical generators or in one or more flare stations in accordance with the applicable SJVAPCD permit and regulations. In 2010 the County entered into an agreement with a developer of LFG-to-energy systems. The County anticipates that the practice of producing electricity from LFG will continue during the development of the site and into the postclosure period. Presently, the LFG treatment equipment is located within the future landfill footprint. The treatment facilities will be moved in coordination with increasing the size of the facility to process increasing L,FG. This movement is not part of closure construction, and is not included in the cost of closure. 2.5.5 Leachate Control Leachate from present and future modules will be collected in leachate collection and recovery systems installed with the modules (JTD Figure 18), and returned to lined modules in accordance with the Waste Discharge Requirements. As the landfill approaches closure, placement of the final cover and the overall thickness and absorptive capacity of the waste mass will cause less leachate to be generated. At this time, it is anticipated that leachate will be pumped from sumps using automatic, level sensing pumps and discharged through flow meters to onsite temporary storage or returned to lined landfill modules in accordance with the WDRs. Foothill Sanitary Landfill B-8 Public Works/Solid Waste Preliminary CPCM Plan County of San Joaquin — Rev July 2010